KEB COMBIVERT F5 MULTI User Manual

10
Project Planning
10
15
KEB COMBIVERT F5
Name: Basis
04.05.04
Chapter Section PageDate
© KEB Antriebstechnik, 2002
All Rights reserved
( )
(J
M
+ J
L
) ï (n
1
- n
2
)
t
Bmin
=
9,55 ï (K ï M
N
+ M
L
)
1. Braking time without braking resistor 2. Braking torque (necessary)
4. Braking time with braking resistor
Formula
Valid range: n
1
> n
N
(Field weakening range)
Condition: M
B
< 1.5 ï M
N
f < 70 Hz
Condition: P
B
< P
R
Valid range: n
1
> n
N
P
R
ï 9,55
Condition:
< M
N
ï (1,5 -K)
(n
1
- n
2
)
f < 70 Hz
P
B
< P
R
J
M
= mass moment of inertia motor [kgm
2
]
J
L
= mass moment of inertia load [kgm
2
]
n
1
= motor speed prior to deceleration [rpm]
n
2
= motor speed after deceleration [rpm]
(standstill= 0 rpm)
n
N
= rated motor speed [rpm]
M
N
= rated motor torque [Nm]
M
B
= braking torque (necessary) [Nm]
M
L
= load torque [Nm]
t
B
= braking time (necessary) [s]
t
Bmin
= minimum braking time [s]
t
Z
= cycle time [s]
P
B
= peak braking power [W]
P
R
= peak power of braking resistor [W]
K = 0,25 for motors up to 1,5 kW
0,20 for motors 2,2 to 4 kW
0,15 for motors 5,5 to 11 kW
0,08 for motors 15 to 45 kW
0,05 for motors > 45 kW
(J
M
+ J
L
) ï (n
1
- n
2
)
M
B
= - M
L
9,55 ï t
B
M
B
ï n
1
P
B
=
9,55
3. Peak braking power
(J
M
+ J
L
) ï (n
1
- n
2
)
t
Bmin
* =
P
R
ï 9,55
9,55 ï Kï M
N
+ M
L
+
(n
1
- n
2
)
Cyclic duration factor (cdf)
t
B
cdf = ï 100 %
120 s
Cyclic duration factor for cycle time t
Z
> 120 s
t
B
cdf = ï 100 %
t
Z
Cyclic duration factor for cycle time t
Z
< 120 s
t
f
t
B
t
Z
Braking time DEC
The braking time DEC is adjusted at the frequency inverter. If it is chosen too
small the KEB COMBIVERT switches off automatically and the error message
OP or OC appears. The approximate braking time can be determined according to
following formulae.

KEB COMBIVERT F5 MULTI Specifications

General

Brand	KEB
Model	COMBIVERT F5 MULTI
Category	DC Drives
Language	English